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<a href="cong__ctl_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#include &quot;<a class="code" href="cong__ctl__classic_8hpp.html">flow/net_flow/detail/cong_ctl/cong_ctl_classic.hpp</a>&quot;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="preprocessor">#include &quot;<a class="code" href="cong__ctl__classic__bw_8hpp.html">flow/net_flow/detail/cong_ctl/cong_ctl_classic_bw.hpp</a>&quot;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceflow_1_1net__flow.html">flow::net_flow</a></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span>{</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span> </div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="comment">// Class Congestion_control_strategy.</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment">// Implementations.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a0eacd984fd4e7d5ad3c30a59082ac95b">   29</a></span><a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a0eacd984fd4e7d5ad3c30a59082ac95b">Congestion_control_strategy::Congestion_control_strategy</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr, <a class="code hl_typedef" href="classflow_1_1util_1_1Shared__ptr__alias__holder.html#aef7998db71c60eeb5d1e3d1a97c14886">Peer_socket::Const_ptr</a> sock) :</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>  Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">Flow_log_component</a>::S_NET_FLOW_CC),</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>  m_sock(sock) <span class="comment">// Get a weak_ptr from a shared_ptr.</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>{</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>  assert(sock);</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>}</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a832c2c5f72635ef0d5716a9198fd16d4">   36</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a832c2c5f72635ef0d5716a9198fd16d4">Congestion_control_strategy::on_acks</a>(<span class="keywordtype">size_t</span>, <span class="keywordtype">size_t</span>) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>{</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>  <span class="comment">// The vacuous congestion control module just ignores acknowledgments.</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>}</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a238eb8f69e309e354d3fbc1c3017f614">   41</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a238eb8f69e309e354d3fbc1c3017f614">Congestion_control_strategy::on_loss_event</a>(<span class="keywordtype">size_t</span>, <span class="keywordtype">size_t</span>)</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>  <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>{</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>  <span class="comment">// The vacuous congestion control module just ignores loss.</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span>}</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#af7543a12c99ea8d31374b064fdf13d2b">   47</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#af7543a12c99ea8d31374b064fdf13d2b">Congestion_control_strategy::on_drop_timeout</a>(<span class="keywordtype">size_t</span>, <span class="keywordtype">size_t</span>)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>  <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>{</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>  <span class="comment">// The vacuous congestion control module just ignores loss.</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>}</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a6cecbb76a9e837824c0b820e7cc1b3b7">   53</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a6cecbb76a9e837824c0b820e7cc1b3b7">Congestion_control_strategy::on_idle_timeout</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>{</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>  <span class="comment">// The vacuous congestion control module just ignores idleness.</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>}</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#ab5a942e2097cbad4ec8ea152d40ed88a">   58</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#ab5a942e2097cbad4ec8ea152d40ed88a">Congestion_control_strategy::on_individual_ack</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">Fine_duration</a>&amp;, <span class="keywordtype">size_t</span>, <span class="keywordtype">size_t</span>) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>{</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>  <span class="comment">// The vacuous congestion control module just ignores individual RTTs.  (Some actual strategies do too.)</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>}</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a3e9786f9e5f170ca23135a2a815bc3f4">   63</a></span><a class="code hl_typedef" href="classflow_1_1util_1_1Shared__ptr__alias__holder.html#aef7998db71c60eeb5d1e3d1a97c14886">Peer_socket::Const_ptr</a> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a3e9786f9e5f170ca23135a2a815bc3f4">Congestion_control_strategy::socket</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>  <span class="keyword">const</span> <a class="code hl_typedef" href="classflow_1_1util_1_1Shared__ptr__alias__holder.html#aef7998db71c60eeb5d1e3d1a97c14886">Peer_socket::Const_ptr</a> sock = <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a1da6833e0c23d111432cbdd3f5451180">m_sock</a>.lock();</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span> </div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>  <span class="comment">/* This trips only if Node violates the &quot;Peer_socket exists while Congestion_control_strategy</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="comment">   * exists&quot; rule.  This assert() is the only reason sock is a weak_ptr&lt;const Peer_socket&gt; instead</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="comment">   * of a &quot;const Peer_socket*&quot;.  Without that we couldn&#39;t perform the assert() and would just</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="comment">   * crash later. */</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>  assert(sock);</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>  <span class="keywordflow">return</span> sock;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>}</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="comment">// Class Congestion_control_selector.</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span> </div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="comment">// Static initializations.</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span> </div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span><span class="keyword">const</span> std::map&lt;std::string, Congestion_control_selector::Strategy_choice&gt;</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>        <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aaa68a02633d67e11bdf7e8e722370ca2">Congestion_control_selector::S_ID_TO_STRATEGY_MAP</a></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>          ({</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>             { <span class="stringliteral">&quot;classic&quot;</span>,</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>               Strategy_choice::S_CLASSIC },</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>             { <span class="stringliteral">&quot;classic_with_bandwidth_est&quot;</span>,</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>               Strategy_choice::S_CLASSIC_BANDWIDTH_ESTIMATED }</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>           });</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span><span class="comment">// Annoying we have to copy/paste/flip S_ID_TO_STRATEGY_MAP, but it&#39;s not that bad.</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span><span class="keyword">const</span> std::map&lt;Congestion_control_selector::Strategy_choice, std::string&gt;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>        <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a590c0877dd8751b190173ed9f01d23c7">Congestion_control_selector::S_STRATEGY_TO_ID_MAP</a></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>          ({</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>             { Strategy_choice::S_CLASSIC,</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>               <span class="stringliteral">&quot;classic&quot;</span> },</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>             { Strategy_choice::S_CLASSIC_BANDWIDTH_ESTIMATED,</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>               <span class="stringliteral">&quot;classic_with_bandwidth_est&quot;</span> }</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>           });</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span> </div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span><span class="comment">// Methods.</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span> </div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a52eee18d41c3f9cc7d6c48b766a7919f">  100</a></span><a class="code hl_class" href="classflow_1_1net__flow_1_1Congestion__control__strategy.html">Congestion_control_strategy</a>* <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a52eee18d41c3f9cc7d6c48b766a7919f">Congestion_control_selector::create_strategy</a></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>                               (<a class="code hl_enumeration" href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245">Strategy_choice</a> strategy_choice,</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>                                <a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr, <a class="code hl_typedef" href="classflow_1_1util_1_1Shared__ptr__alias__holder.html#aef7998db71c60eeb5d1e3d1a97c14886">Peer_socket::Const_ptr</a> sock) <span class="comment">// Static</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>{</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>  <span class="keywordflow">switch</span> (strategy_choice)</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  {</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>  <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245a13d31c1bffdbda8309c52bb997064862">Strategy_choice::S_CLASSIC</a>:</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>    <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code hl_class" href="classflow_1_1net__flow_1_1Congestion__control__classic.html">Congestion_control_classic</a>(logger_ptr, sock);</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>  <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245a656db2a2ff0f24f703b6ac341e97537e">Strategy_choice::S_CLASSIC_BANDWIDTH_ESTIMATED</a>:</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>    <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code hl_class" href="classflow_1_1net__flow_1_1Congestion__control__classic__with__bandwidth__est.html">Congestion_control_classic_with_bandwidth_est</a>(logger_ptr, sock);</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>  }</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>  assert(<span class="keyword">false</span>);</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>}</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span> </div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aca9ae5272088f3ef8fb81f40cc85224c">  115</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aca9ae5272088f3ef8fb81f40cc85224c">Congestion_control_selector::get_ids</a>(std::vector&lt;std::string&gt;* ids) <span class="comment">// Static.</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>{</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>  ids-&gt;clear();</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; id_and_strategy : <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aaa68a02633d67e11bdf7e8e722370ca2">S_ID_TO_STRATEGY_MAP</a>)</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>  {</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>    ids-&gt;push_back(id_and_strategy.first);</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>  }</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>}</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span> </div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aa4e29e3faa67810804c3053b8ed33380">  124</a></span>std::istream&amp; <a class="code hl_function" href="namespaceflow_1_1net__flow.html#aad968d3e7e9c3f284bea03e799d5fbc0">operator&gt;&gt;</a>(std::istream&amp; is, <a class="code hl_enumeration" href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245">Congestion_control_selector::Strategy_choice</a>&amp; strategy_choice)</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>{</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>  <span class="comment">/* It&#39;s slightly weird, but the prototype for this is in options.hpp, so that it is available</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span><span class="comment">   * to the user.  But the implementation is here, since we need access to Congestion_control_selector....</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="comment">   * @todo It&#39;s irregular but seems OK.  Revisit. */</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>  <span class="keyword">using </span>std::string;</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>  <span class="comment">// Read a token (space-delimited word) from the input stream into the string.</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>  <span class="keywordtype">string</span> id;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>  is &gt;&gt; id;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>  <span class="comment">// If there was nothing left in stream, or other error, is.good() is false now.  Not our problem.</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span> </div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>  <span class="comment">// Try to map that token to the known IDs.  If unknown, choose the default (Reno for now).</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>  <span class="keyword">auto</span> it = <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aaa68a02633d67e11bdf7e8e722370ca2">Congestion_control_selector::S_ID_TO_STRATEGY_MAP</a>.find(<span class="keywordtype">id</span>);</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>  strategy_choice = (it == <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aaa68a02633d67e11bdf7e8e722370ca2">Congestion_control_selector::S_ID_TO_STRATEGY_MAP</a>.end())</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>                      ? <a class="code hl_enumvalue" href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245a13d31c1bffdbda8309c52bb997064862">Congestion_control_selector::Strategy_choice::S_CLASSIC</a></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>                      : it-&gt;second;</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  <span class="keywordflow">return</span> is;</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>}</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"><a class="line" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a0b2749c14e5458e40eb2d40d0d4f1144">  146</a></span>std::ostream&amp; <a class="code hl_function" href="namespaceflow_1_1net__flow.html#ab9f537c84f77e9b8fa742fc5dc6d5693">operator&lt;&lt;</a>(std::ostream&amp; os, <span class="keyword">const</span> <a class="code hl_enumeration" href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245">Congestion_control_selector::Strategy_choice</a>&amp; strategy_choice)</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>{</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>  <span class="comment">// See comment at top of operator&lt;&lt;().</span></div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>  <span class="comment">// Just print the text ID of the given enum value.</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>  <span class="keyword">auto</span> it = <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a590c0877dd8751b190173ed9f01d23c7">Congestion_control_selector::S_STRATEGY_TO_ID_MAP</a>.find(strategy_choice);</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>  assert(it != <a class="code hl_variable" href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a590c0877dd8751b190173ed9f01d23c7">Congestion_control_selector::S_STRATEGY_TO_ID_MAP</a>.end());</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span> </div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>  <span class="keywordflow">return</span> os &lt;&lt; it-&gt;second;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>}</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span> </div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>} <span class="comment">// namespace flow::net_flow</span></div>
<div class="ttc" id="aclassflow_1_1log_1_1Logger_html"><div class="ttname"><a href="classflow_1_1log_1_1Logger.html">flow::log::Logger</a></div><div class="ttdoc">Interface that the user should implement, passing the implementing Logger into logging classes (Flow'...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l01280">log.hpp:1284</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__classic__with__bandwidth__est_html"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__classic__with__bandwidth__est.html">flow::net_flow::Congestion_control_classic_with_bandwidth_est</a></div><div class="ttdoc">Classic congestion control but with backoff to bandwidth estimate-based pipe size.</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl__classic__bw_8hpp_source.html#l00061">cong_ctl_classic_bw.hpp:63</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__classic_html"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__classic.html">flow::net_flow::Congestion_control_classic</a></div><div class="ttdoc">Classic congestion control, based on Reno (TCP RFC 5681), with congestion avoidance,...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl__classic_8hpp_source.html#l00063">cong_ctl_classic.hpp:65</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__selector_html_a52eee18d41c3f9cc7d6c48b766a7919f"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a52eee18d41c3f9cc7d6c48b766a7919f">flow::net_flow::Congestion_control_selector::create_strategy</a></div><div class="ttdeci">static Congestion_control_strategy * create_strategy(Strategy_choice strategy_choice, log::Logger *logger_ptr, Peer_socket::Const_ptr sock)</div><div class="ttdoc">Factory method that, given an enum identifying the desired strategy, allocates the appropriate Conges...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00100">cong_ctl.cpp:101</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__selector_html_a590c0877dd8751b190173ed9f01d23c7"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__selector.html#a590c0877dd8751b190173ed9f01d23c7">flow::net_flow::Congestion_control_selector::S_STRATEGY_TO_ID_MAP</a></div><div class="ttdeci">static const std::map&lt; Strategy_choice, std::string &gt; S_STRATEGY_TO_ID_MAP</div><div class="ttdoc">The inverse of S_ID_TO_STRATEGY_MAP.</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8hpp_source.html#l00498">cong_ctl.hpp:498</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__selector_html_aaa68a02633d67e11bdf7e8e722370ca2"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aaa68a02633d67e11bdf7e8e722370ca2">flow::net_flow::Congestion_control_selector::S_ID_TO_STRATEGY_MAP</a></div><div class="ttdeci">static const std::map&lt; std::string, Strategy_choice &gt; S_ID_TO_STRATEGY_MAP</div><div class="ttdoc">Maps each ID to the corresponding Strategy_choice enum value.</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8hpp_source.html#l00496">cong_ctl.hpp:496</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__selector_html_aca9ae5272088f3ef8fb81f40cc85224c"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__selector.html#aca9ae5272088f3ef8fb81f40cc85224c">flow::net_flow::Congestion_control_selector::get_ids</a></div><div class="ttdeci">static void get_ids(std::vector&lt; std::string &gt; *ids)</div><div class="ttdoc">Returns a list of strings, called IDs, each of which textually represents a distinct Congestion_contr...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00115">cong_ctl.cpp:115</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html">flow::net_flow::Congestion_control_strategy</a></div><div class="ttdoc">The abstract interface for a per-socket module that determines the socket's congestion control behavi...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8hpp_source.html#l00176">cong_ctl.hpp:180</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_a0eacd984fd4e7d5ad3c30a59082ac95b"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a0eacd984fd4e7d5ad3c30a59082ac95b">flow::net_flow::Congestion_control_strategy::Congestion_control_strategy</a></div><div class="ttdeci">Congestion_control_strategy(log::Logger *logger_ptr, Peer_socket::Const_ptr sock)</div><div class="ttdoc">Constructs object by setting up logging and saving a pointer to the containing Peer_socket.</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00029">cong_ctl.cpp:29</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_a1da6833e0c23d111432cbdd3f5451180"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a1da6833e0c23d111432cbdd3f5451180">flow::net_flow::Congestion_control_strategy::m_sock</a></div><div class="ttdeci">boost::weak_ptr&lt; Peer_socket::Const_ptr::element_type &gt; m_sock</div><div class="ttdoc">The containing socket (read-only access).</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8hpp_source.html#l00433">cong_ctl.hpp:433</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_a238eb8f69e309e354d3fbc1c3017f614"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a238eb8f69e309e354d3fbc1c3017f614">flow::net_flow::Congestion_control_strategy::on_loss_event</a></div><div class="ttdeci">virtual void on_loss_event(size_t bytes, size_t packets)</div><div class="ttdoc">Informs the congestion control strategy that 1 or more previously sent packets whose status was In-fl...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00041">cong_ctl.cpp:41</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_a3e9786f9e5f170ca23135a2a815bc3f4"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a3e9786f9e5f170ca23135a2a815bc3f4">flow::net_flow::Congestion_control_strategy::socket</a></div><div class="ttdeci">Peer_socket::Const_ptr socket() const</div><div class="ttdoc">Utility for subclasses that returns a handle to the containing Peer_socket.</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00063">cong_ctl.cpp:63</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_a6cecbb76a9e837824c0b820e7cc1b3b7"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a6cecbb76a9e837824c0b820e7cc1b3b7">flow::net_flow::Congestion_control_strategy::on_idle_timeout</a></div><div class="ttdeci">virtual void on_idle_timeout()</div><div class="ttdoc">Informs the congestion control strategy that Node considers the connection to be &quot;idle&quot; by virtue of ...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00053">cong_ctl.cpp:53</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_a832c2c5f72635ef0d5716a9198fd16d4"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#a832c2c5f72635ef0d5716a9198fd16d4">flow::net_flow::Congestion_control_strategy::on_acks</a></div><div class="ttdeci">virtual void on_acks(size_t bytes, size_t packets)</div><div class="ttdoc">Informs the congestion control strategy that 1 or more previously sent packets whose status was In-fl...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00036">cong_ctl.cpp:36</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_ab5a942e2097cbad4ec8ea152d40ed88a"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#ab5a942e2097cbad4ec8ea152d40ed88a">flow::net_flow::Congestion_control_strategy::on_individual_ack</a></div><div class="ttdeci">virtual void on_individual_ack(const Fine_duration &amp;packet_rtt, const size_t bytes, const size_t sent_cwnd_bytes)</div><div class="ttdoc">Informs the congestion control strategy that exactly 1 previously sent packet whose status was In-fli...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00058">cong_ctl.cpp:58</a></div></div>
<div class="ttc" id="aclassflow_1_1net__flow_1_1Congestion__control__strategy_html_af7543a12c99ea8d31374b064fdf13d2b"><div class="ttname"><a href="classflow_1_1net__flow_1_1Congestion__control__strategy.html#af7543a12c99ea8d31374b064fdf13d2b">flow::net_flow::Congestion_control_strategy::on_drop_timeout</a></div><div class="ttdeci">virtual void on_drop_timeout(size_t bytes, size_t packets)</div><div class="ttdoc">Informs the congestion control strategy that 1 or more previously sent packets whose status was In-fl...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00047">cong_ctl.cpp:47</a></div></div>
<div class="ttc" id="aclassflow_1_1util_1_1Shared__ptr__alias__holder_html_aef7998db71c60eeb5d1e3d1a97c14886"><div class="ttname"><a href="classflow_1_1util_1_1Shared__ptr__alias__holder.html#aef7998db71c60eeb5d1e3d1a97c14886">flow::util::Shared_ptr_alias_holder&lt; boost::shared_ptr&lt; Peer_socket &gt; &gt;::Const_ptr</a></div><div class="ttdeci">Const_target_ptr Const_ptr</div><div class="ttdoc">Short-hand for ref-counted pointer to immutable values of type Target_type::element_type (a-la T cons...</div><div class="ttdef"><b>Definition:</b> <a href="shared__ptr__alias__holder_8hpp_source.html#l00127">shared_ptr_alias_holder.hpp:127</a></div></div>
<div class="ttc" id="acong__ctl__classic_8hpp_html"><div class="ttname"><a href="cong__ctl__classic_8hpp.html">cong_ctl_classic.hpp</a></div></div>
<div class="ttc" id="acong__ctl__classic__bw_8hpp_html"><div class="ttname"><a href="cong__ctl__classic__bw_8hpp.html">cong_ctl_classic_bw.hpp</a></div></div>
<div class="ttc" id="anamespaceflow_1_1net__flow_html"><div class="ttname"><a href="namespaceflow_1_1net__flow.html">flow::net_flow</a></div><div class="ttdoc">Flow module containing the API and implementation of the Flow network protocol, a TCP-inspired stream...</div><div class="ttdef"><b>Definition:</b> <a href="asio_2node_8cpp_source.html#l00024">node.cpp:25</a></div></div>
<div class="ttc" id="anamespaceflow_1_1net__flow_html_aad968d3e7e9c3f284bea03e799d5fbc0"><div class="ttname"><a href="namespaceflow_1_1net__flow.html#aad968d3e7e9c3f284bea03e799d5fbc0">flow::net_flow::operator&gt;&gt;</a></div><div class="ttdeci">std::istream &amp; operator&gt;&gt;(std::istream &amp;is, Congestion_control_selector::Strategy_choice &amp;strategy_choice)</div><div class="ttdoc">Deserializes a Peer_socket_options::Congestion_control_strategy_choice enum from a standard input str...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00124">cong_ctl.cpp:124</a></div></div>
<div class="ttc" id="anamespaceflow_1_1net__flow_html_ab9f537c84f77e9b8fa742fc5dc6d5693"><div class="ttname"><a href="namespaceflow_1_1net__flow.html#ab9f537c84f77e9b8fa742fc5dc6d5693">flow::net_flow::operator&lt;&lt;</a></div><div class="ttdeci">std::ostream &amp; operator&lt;&lt;(std::ostream &amp;os, const Congestion_control_selector::Strategy_choice &amp;strategy_choice)</div><div class="ttdoc">Serializes a Peer_socket_options::Congestion_control_strategy_choice enum to a standard ostream – the...</div><div class="ttdef"><b>Definition:</b> <a href="cong__ctl_8cpp_source.html#l00146">cong_ctl.cpp:146</a></div></div>
<div class="ttc" id="anamespaceflow_html_a3938730ab4b89daf13d027a5f620e7ce"><div class="ttname"><a href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">flow::Flow_log_component</a></div><div class="ttdeci">Flow_log_component</div><div class="ttdoc">The flow::log::Component payload enumeration comprising various log components used by Flow's own int...</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00637">common.hpp:638</a></div></div>
<div class="ttc" id="anamespaceflow_html_a48799f1263cdeedec125be51a3db2b79"><div class="ttname"><a href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">flow::Fine_duration</a></div><div class="ttdeci">Fine_clock::duration Fine_duration</div><div class="ttdoc">A high-res time duration as computed from two Fine_time_pts.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00416">common.hpp:416</a></div></div>
<div class="ttc" id="astructflow_1_1net__flow_1_1Peer__socket__options_html_a42ce94dbc5d8be28134261c2eb18b245"><div class="ttname"><a href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245">flow::net_flow::Peer_socket_options::Congestion_control_strategy_choice</a></div><div class="ttdeci">Congestion_control_strategy_choice</div><div class="ttdoc">The possible choices for congestion control strategy for the socket.</div><div class="ttdef"><b>Definition:</b> <a href="options_8hpp_source.html#l00062">options.hpp:63</a></div></div>
<div class="ttc" id="astructflow_1_1net__flow_1_1Peer__socket__options_html_a42ce94dbc5d8be28134261c2eb18b245a13d31c1bffdbda8309c52bb997064862"><div class="ttname"><a href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245a13d31c1bffdbda8309c52bb997064862">flow::net_flow::Peer_socket_options::Congestion_control_strategy_choice::S_CLASSIC</a></div><div class="ttdeci">@ S_CLASSIC</div><div class="ttdoc">Classic (Reno-style) AIMD congestion control.</div></div>
<div class="ttc" id="astructflow_1_1net__flow_1_1Peer__socket__options_html_a42ce94dbc5d8be28134261c2eb18b245a656db2a2ff0f24f703b6ac341e97537e"><div class="ttname"><a href="structflow_1_1net__flow_1_1Peer__socket__options.html#a42ce94dbc5d8be28134261c2eb18b245a656db2a2ff0f24f703b6ac341e97537e">flow::net_flow::Peer_socket_options::Congestion_control_strategy_choice::S_CLASSIC_BANDWIDTH_ESTIMATED</a></div><div class="ttdeci">@ S_CLASSIC_BANDWIDTH_ESTIMATED</div><div class="ttdoc">Classic congestion control but with loss resulting in a window chosen from an outgoing bandwidth esti...</div></div>
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